drivers/input/touchscreen/usbtouchscreen.c

   1 /******************************************************************************
   2  * usbtouchscreen.c
   3  * Driver for USB Touchscreens, supporting those devices:
   4  *  - eGalax Touchkit
   5  *    includes eTurboTouch CT-410/510/700
   6  *  - 3M/Microtouch  EX II series
   7  *  - ITM
   8  *  - PanJit TouchSet
   9  *  - eTurboTouch
  10  *  - Gunze AHL61
  11  *  - DMC TSC-10/25
  12  *  - IRTOUCHSYSTEMS/UNITOP
  13  *  - IdealTEK URTC1000
  14  *
  15  * Copyright (C) 2004-2006 by Daniel Ritz <daniel.ritz@gmx.ch>
  16  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  17  *
  18  * This program is free software; you can redistribute it and/or
  19  * modify it under the terms of the GNU General Public License as
  20  * published by the Free Software Foundation; either version 2 of the
  21  * License, or (at your option) any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful, but
  24  * WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  26  * General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  31  *
  32  * Driver is based on touchkitusb.c
  33  * - ITM parts are from itmtouch.c
  34  * - 3M parts are from mtouchusb.c
  35  * - PanJit parts are from an unmerged driver by Lanslott Gish
  36  * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
  37  *   driver from Marius Vollmer
  38  *
  39  *****************************************************************************/
  40
  41 //#define DEBUG
  42
  43 #include <linux/kernel.h>
  44 #include <linux/slab.h>
  45 #include <linux/input.h>
  46 #include <linux/module.h>
  47 #include <linux/init.h>
  48 #include <linux/usb.h>
  49 #include <linux/usb/input.h>
  50
  51
  52 #define DRIVER_VERSION          "v0.5"
  53 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
  54 #define DRIVER_DESC             "USB Touchscreen Driver"
  55
  56 static int swap_xy;
  57 module_param(swap_xy, bool, 0644);
  58 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  59
  60 /* device specifc data/functions */
  61 struct usbtouch_usb;
  62 struct usbtouch_device_info {
  63         int min_xc, max_xc;
  64         int min_yc, max_yc;
  65         int min_press, max_press;
  66         int rept_size;
  67         int flags;
  68
  69         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
  70         int  (*get_pkt_len) (unsigned char *pkt, int len);
  71         int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
  72         int  (*init)        (struct usbtouch_usb *usbtouch);
  73 };
  74
  75 #define USBTOUCH_FLG_BUFFER     0x01
  76
  77
  78 /* a usbtouch device */
  79 struct usbtouch_usb {
  80         unsigned char *data;
  81         dma_addr_t data_dma;
  82         unsigned char *buffer;
  83         int buf_len;
  84         struct urb *irq;
  85         struct usb_device *udev;
  86         struct input_dev *input;
  87         struct usbtouch_device_info *type;
  88         char name[128];
  89         char phys[64];
  90
  91         int x, y;
  92         int touch, press;
  93 };
  94
  95
  96 #if defined(CONFIG_TOUCHSCREEN_USB_EGALAX) || defined(CONFIG_TOUCHSCREEN_USB_ETURBO) || defined(CONFIG_TOUCHSCREEN_USB_IDEALTEK)
  97 #define MULTI_PACKET
  98 #endif
  99
 100 #ifdef MULTI_PACKET
 101 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 102                                    unsigned char *pkt, int len);
 103 #endif
 104
 105 /* device types */
 106 enum {
 107         DEVTPYE_DUMMY = -1,
 108         DEVTYPE_EGALAX,
 109         DEVTYPE_PANJIT,
 110         DEVTYPE_3M,
 111         DEVTYPE_ITM,
 112         DEVTYPE_ETURBO,
 113         DEVTYPE_GUNZE,
 114         DEVTYPE_DMC_TSC10,
 115         DEVTYPE_IRTOUCH,
 116         DEVTYPE_IDEALTEK,
 117 };
 118
 119 static struct usb_device_id usbtouch_devices[] = {
 120 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 121         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
 122         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
 123         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
 124         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
 125         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
 126         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
 127         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
 128 #endif
 129
 130 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 131         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
 132         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
 133         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
 134         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
 135 #endif
 136
 137 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 138         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
 139 #endif
 140
 141 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 142         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
 143 #endif
 144
 145 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 146         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
 147 #endif
 148
 149 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 150         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
 151 #endif
 152
 153 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 154         {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
 155 #endif
 156
 157 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 158         {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 159         {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 160 #endif
 161
 162 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 163         {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
 164 #endif
 165
 166         {}
 167 };
 168
 169
 170 /*****************************************************************************
 171  * eGalax part
 172  */
 173
 174 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 175
 176 #define EGALAX_PKT_TYPE_MASK            0xFE
 177 #define EGALAX_PKT_TYPE_REPT            0x80
 178 #define EGALAX_PKT_TYPE_DIAG            0x0A
 179
 180 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 181 {
 182         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 183                 return 0;
 184
 185         dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 186         dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 187         dev->touch = pkt[0] & 0x01;
 188
 189         return 1;
 190 }
 191
 192 static int egalax_get_pkt_len(unsigned char *buf, int len)
 193 {
 194         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 195         case EGALAX_PKT_TYPE_REPT:
 196                 return 5;
 197
 198         case EGALAX_PKT_TYPE_DIAG:
 199                 if (len < 2)
 200                         return -1;
 201
 202                 return buf[1] + 2;
 203         }
 204
 205         return 0;
 206 }
 207 #endif
 208
 209
 210 /*****************************************************************************
 211  * PanJit Part
 212  */
 213 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 214 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 215 {
 216         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 217         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 218         dev->touch = pkt[0] & 0x01;
 219
 220         return 1;
 221 }
 222 #endif
 223
 224
 225 /*****************************************************************************
 226  * 3M/Microtouch Part
 227  */
 228 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 229
 230 #define MTOUCHUSB_ASYNC_REPORT          1
 231 #define MTOUCHUSB_RESET                 7
 232 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 233
 234 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 235 {
 236         dev->x = (pkt[8] << 8) | pkt[7];
 237         dev->y = (pkt[10] << 8) | pkt[9];
 238         dev->touch = (pkt[2] & 0x40) ? 1 : 0;
 239
 240         return 1;
 241 }
 242
 243 static int mtouch_init(struct usbtouch_usb *usbtouch)
 244 {
 245         int ret, i;
 246
 247         ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
 248                               MTOUCHUSB_RESET,
 249                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 250                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 251         dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
 252             __FUNCTION__, ret);
 253         if (ret < 0)
 254                 return ret;
 255         msleep(150);
 256
 257         for (i = 0; i < 3; i++) {
 258                 ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
 259                                       MTOUCHUSB_ASYNC_REPORT,
 260                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 261                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 262                 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
 263                     __FUNCTION__, ret);
 264                 if (ret >= 0)
 265                         break;
 266                 if (ret != -EPIPE)
 267                         return ret;
 268         }
 269
 270         return 0;
 271 }
 272 #endif
 273
 274
 275 /*****************************************************************************
 276  * ITM Part
 277  */
 278 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 279 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 280 {
 281         int touch;
 282         /*
 283          * ITM devices report invalid x/y data if not touched.
 284          * if the screen was touched before but is not touched any more
 285          * report touch as 0 with the last valid x/y data once. then stop
 286          * reporting data until touched again.
 287          */
 288         dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
 289
 290         touch = ~pkt[7] & 0x20;
 291         if (!touch) {
 292                 if (dev->touch) {
 293                         dev->touch = 0;
 294                         return 1;
 295                 }
 296
 297                 return 0;
 298         }
 299
 300         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 301         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 302         dev->touch = touch;
 303
 304         return 1;
 305 }
 306 #endif
 307
 308
 309 /*****************************************************************************
 310  * eTurboTouch part
 311  */
 312 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 313 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 314 {
 315         unsigned int shift;
 316
 317         /* packets should start with sync */
 318         if (!(pkt[0] & 0x80))
 319                 return 0;
 320
 321         shift = (6 - (pkt[0] & 0x03));
 322         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
 323         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
 324         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
 325
 326         return 1;
 327 }
 328
 329 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 330 {
 331         if (buf[0] & 0x80)
 332                 return 5;
 333         if (buf[0] == 0x01)
 334                 return 3;
 335         return 0;
 336 }
 337 #endif
 338
 339
 340 /*****************************************************************************
 341  * Gunze part
 342  */
 343 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 344 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 345 {
 346         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 347                 return 0;
 348
 349         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 350         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 351         dev->touch = pkt[0] & 0x20;
 352
 353         return 1;
 354 }
 355 #endif
 356
 357 /*****************************************************************************
 358  * DMC TSC-10/25 Part
 359  *
 360  * Documentation about the controller and it's protocol can be found at
 361  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
 362  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
 363  */
 364 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 365
 366 /* supported data rates. currently using 130 */
 367 #define TSC10_RATE_POINT        0x50
 368 #define TSC10_RATE_30           0x40
 369 #define TSC10_RATE_50           0x41
 370 #define TSC10_RATE_80           0x42
 371 #define TSC10_RATE_100          0x43
 372 #define TSC10_RATE_130          0x44
 373 #define TSC10_RATE_150          0x45
 374
 375 /* commands */
 376 #define TSC10_CMD_RESET         0x55
 377 #define TSC10_CMD_RATE          0x05
 378 #define TSC10_CMD_DATA1         0x01
 379
 380 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 381 {
 382         struct usb_device *dev = usbtouch->udev;
 383         int ret;
 384         unsigned char buf[2];
 385
 386         /* reset */
 387         buf[0] = buf[1] = 0xFF;
 388         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 389                               TSC10_CMD_RESET,
 390                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 391                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 392         if (ret < 0)
 393                 return ret;
 394         if (buf[0] != 0x06 || buf[1] != 0x00)
 395                 return -ENODEV;
 396
 397         /* set coordinate output rate */
 398         buf[0] = buf[1] = 0xFF;
 399         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 400                               TSC10_CMD_RATE,
 401                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 402                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 403         if (ret < 0)
 404                 return ret;
 405         if (buf[0] != 0x06 || buf[1] != 0x00)
 406                 return -ENODEV;
 407
 408         /* start sending data */
 409         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 410                               TSC10_CMD_DATA1,
 411                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 412                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 413         if (ret < 0)
 414                 return ret;
 415
 416         return 0;
 417 }
 418
 419
 420 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 421 {
 422         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
 423         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
 424         dev->touch = pkt[0] & 0x01;
 425
 426         return 1;
 427 }
 428 #endif
 429
 430
 431 /*****************************************************************************
 432  * IRTOUCH Part
 433  */
 434 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 435 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 436 {
 437         dev->x = (pkt[3] << 8) | pkt[2];
 438         dev->y = (pkt[5] << 8) | pkt[4];
 439         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
 440
 441         return 1;
 442 }
 443 #endif
 444
 445
 446 /*****************************************************************************
 447  * IdealTEK URTC1000 Part
 448  */
 449 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 450 static int idealtek_get_pkt_len(unsigned char *buf, int len)
 451 {
 452         if (buf[0] & 0x80)
 453                 return 5;
 454         if (buf[0] == 0x01)
 455                 return len;
 456         return 0;
 457 }
 458
 459 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 460 {
 461         switch (pkt[0] & 0x98) {
 462         case 0x88:
 463                 /* touch data in IdealTEK mode */
 464                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
 465                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
 466                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 467                 return 1;
 468
 469         case 0x98:
 470                 /* touch data in MT emulation mode */
 471                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
 472                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
 473                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 474                 return 1;
 475
 476         default:
 477                 return 0;
 478         }
 479 }
 480 #endif
 481
 482
 483 /*****************************************************************************
 484  * the different device descriptors
 485  */
 486 static struct usbtouch_device_info usbtouch_dev_info[] = {
 487 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 488         [DEVTYPE_EGALAX] = {
 489                 .min_xc         = 0x0,
 490                 .max_xc         = 0x07ff,
 491                 .min_yc         = 0x0,
 492                 .max_yc         = 0x07ff,
 493                 .rept_size      = 16,
 494                 .flags          = USBTOUCH_FLG_BUFFER,
 495                 .process_pkt    = usbtouch_process_multi,
 496                 .get_pkt_len    = egalax_get_pkt_len,
 497                 .read_data      = egalax_read_data,
 498         },
 499 #endif
 500
 501 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 502         [DEVTYPE_PANJIT] = {
 503                 .min_xc         = 0x0,
 504                 .max_xc         = 0x0fff,
 505                 .min_yc         = 0x0,
 506                 .max_yc         = 0x0fff,
 507                 .rept_size      = 8,
 508                 .read_data      = panjit_read_data,
 509         },
 510 #endif
 511
 512 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 513         [DEVTYPE_3M] = {
 514                 .min_xc         = 0x0,
 515                 .max_xc         = 0x4000,
 516                 .min_yc         = 0x0,
 517                 .max_yc         = 0x4000,
 518                 .rept_size      = 11,
 519                 .read_data      = mtouch_read_data,
 520                 .init           = mtouch_init,
 521         },
 522 #endif
 523
 524 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 525         [DEVTYPE_ITM] = {
 526                 .min_xc         = 0x0,
 527                 .max_xc         = 0x0fff,
 528                 .min_yc         = 0x0,
 529                 .max_yc         = 0x0fff,
 530                 .max_press      = 0xff,
 531                 .rept_size      = 8,
 532                 .read_data      = itm_read_data,
 533         },
 534 #endif
 535
 536 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 537         [DEVTYPE_ETURBO] = {
 538                 .min_xc         = 0x0,
 539                 .max_xc         = 0x07ff,
 540                 .min_yc         = 0x0,
 541                 .max_yc         = 0x07ff,
 542                 .rept_size      = 8,
 543                 .flags          = USBTOUCH_FLG_BUFFER,
 544                 .process_pkt    = usbtouch_process_multi,
 545                 .get_pkt_len    = eturbo_get_pkt_len,
 546                 .read_data      = eturbo_read_data,
 547         },
 548 #endif
 549
 550 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 551         [DEVTYPE_GUNZE] = {
 552                 .min_xc         = 0x0,
 553                 .max_xc         = 0x0fff,
 554                 .min_yc         = 0x0,
 555                 .max_yc         = 0x0fff,
 556                 .rept_size      = 4,
 557                 .read_data      = gunze_read_data,
 558         },
 559 #endif
 560
 561 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 562         [DEVTYPE_DMC_TSC10] = {
 563                 .min_xc         = 0x0,
 564                 .max_xc         = 0x03ff,
 565                 .min_yc         = 0x0,
 566                 .max_yc         = 0x03ff,
 567                 .rept_size      = 5,
 568                 .init           = dmc_tsc10_init,
 569                 .read_data      = dmc_tsc10_read_data,
 570         },
 571 #endif
 572
 573 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 574         [DEVTYPE_IRTOUCH] = {
 575                 .min_xc         = 0x0,
 576                 .max_xc         = 0x0fff,
 577                 .min_yc         = 0x0,
 578                 .max_yc         = 0x0fff,
 579                 .rept_size      = 8,
 580                 .read_data      = irtouch_read_data,
 581         },
 582 #endif
 583
 584 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 585         [DEVTYPE_IDEALTEK] = {
 586                 .min_xc         = 0x0,
 587                 .max_xc         = 0x0fff,
 588                 .min_yc         = 0x0,
 589                 .max_yc         = 0x0fff,
 590                 .rept_size      = 8,
 591                 .flags          = USBTOUCH_FLG_BUFFER,
 592                 .process_pkt    = usbtouch_process_multi,
 593                 .get_pkt_len    = idealtek_get_pkt_len,
 594                 .read_data      = idealtek_read_data,
 595         },
 596 #endif
 597 };
 598
 599
 600 /*****************************************************************************
 601  * Generic Part
 602  */
 603 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
 604                                  unsigned char *pkt, int len)
 605 {
 606         struct usbtouch_device_info *type = usbtouch->type;
 607
 608         if (!type->read_data(usbtouch, pkt))
 609                         return;
 610
 611         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
 612
 613         if (swap_xy) {
 614                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
 615                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
 616         } else {
 617                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
 618                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
 619         }
 620         if (type->max_press)
 621                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
 622         input_sync(usbtouch->input);
 623 }
 624
 625
 626 #ifdef MULTI_PACKET
 627 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 628                                    unsigned char *pkt, int len)
 629 {
 630         unsigned char *buffer;
 631         int pkt_len, pos, buf_len, tmp;
 632
 633         /* process buffer */
 634         if (unlikely(usbtouch->buf_len)) {
 635                 /* try to get size */
 636                 pkt_len = usbtouch->type->get_pkt_len(
 637                                 usbtouch->buffer, usbtouch->buf_len);
 638
 639                 /* drop? */
 640                 if (unlikely(!pkt_len))
 641                         goto out_flush_buf;
 642
 643                 /* need to append -pkt_len bytes before able to get size */
 644                 if (unlikely(pkt_len < 0)) {
 645                         int append = -pkt_len;
 646                         if (unlikely(append > len))
 647                                append = len;
 648                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
 649                                 goto out_flush_buf;
 650                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
 651                         usbtouch->buf_len += append;
 652
 653                         pkt_len = usbtouch->type->get_pkt_len(
 654                                         usbtouch->buffer, usbtouch->buf_len);
 655                         if (pkt_len < 0)
 656                                 return;
 657                 }
 658
 659                 /* append */
 660                 tmp = pkt_len - usbtouch->buf_len;
 661                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
 662                         goto out_flush_buf;
 663                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
 664                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
 665
 666                 buffer = pkt + tmp;
 667                 buf_len = len - tmp;
 668         } else {
 669                 buffer = pkt;
 670                 buf_len = len;
 671         }
 672
 673         /* loop over the received packet, process */
 674         pos = 0;
 675         while (pos < buf_len) {
 676                 /* get packet len */
 677                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos, len);
 678
 679                 /* unknown packet: drop everything */
 680                 if (unlikely(!pkt_len))
 681                         goto out_flush_buf;
 682
 683                 /* full packet: process */
 684                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
 685                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
 686                 } else {
 687                         /* incomplete packet: save in buffer */
 688                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
 689                         usbtouch->buf_len = buf_len - pos;
 690                         return;
 691                 }
 692                 pos += pkt_len;
 693         }
 694
 695 out_flush_buf:
 696         usbtouch->buf_len = 0;
 697         return;
 698 }
 699 #endif
 700
 701
 702 static void usbtouch_irq(struct urb *urb)
 703 {
 704         struct usbtouch_usb *usbtouch = urb->context;
 705         int retval;
 706
 707         switch (urb->status) {
 708         case 0:
 709                 /* success */
 710                 break;
 711         case -ETIME:
 712                 /* this urb is timing out */
 713                 dbg("%s - urb timed out - was the device unplugged?",
 714                     __FUNCTION__);
 715                 return;
 716         case -ECONNRESET:
 717         case -ENOENT:
 718         case -ESHUTDOWN:
 719                 /* this urb is terminated, clean up */
 720                 dbg("%s - urb shutting down with status: %d",
 721                     __FUNCTION__, urb->status);
 722                 return;
 723         default:
 724                 dbg("%s - nonzero urb status received: %d",
 725                     __FUNCTION__, urb->status);
 726                 goto exit;
 727         }
 728
 729         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
 730
 731 exit:
 732         retval = usb_submit_urb(urb, GFP_ATOMIC);
 733         if (retval)
 734                 err("%s - usb_submit_urb failed with result: %d",
 735                     __FUNCTION__, retval);
 736 }
 737
 738 static int usbtouch_open(struct input_dev *input)
 739 {
 740         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
 741
 742         usbtouch->irq->dev = usbtouch->udev;
 743
 744         if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
 745                 return -EIO;
 746
 747         return 0;
 748 }
 749
 750 static void usbtouch_close(struct input_dev *input)
 751 {
 752         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
 753
 754         usb_kill_urb(usbtouch->irq);
 755 }
 756
 757
 758 static void usbtouch_free_buffers(struct usb_device *udev,
 759                                   struct usbtouch_usb *usbtouch)
 760 {
 761         usb_buffer_free(udev, usbtouch->type->rept_size,
 762                         usbtouch->data, usbtouch->data_dma);
 763         kfree(usbtouch->buffer);
 764 }
 765
 766
 767 static int usbtouch_probe(struct usb_interface *intf,
 768                           const struct usb_device_id *id)
 769 {
 770         struct usbtouch_usb *usbtouch;
 771         struct input_dev *input_dev;
 772         struct usb_host_interface *interface;
 773         struct usb_endpoint_descriptor *endpoint;
 774         struct usb_device *udev = interface_to_usbdev(intf);
 775         struct usbtouch_device_info *type;
 776         int err = -ENOMEM;
 777
 778         interface = intf->cur_altsetting;
 779         endpoint = &interface->endpoint[0].desc;
 780
 781         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
 782         input_dev = input_allocate_device();
 783         if (!usbtouch || !input_dev)
 784                 goto out_free;
 785
 786         type = &usbtouch_dev_info[id->driver_info];
 787         usbtouch->type = type;
 788         if (!type->process_pkt)
 789                 type->process_pkt = usbtouch_process_pkt;
 790
 791         usbtouch->data = usb_buffer_alloc(udev, type->rept_size,
 792                                           GFP_KERNEL, &usbtouch->data_dma);
 793         if (!usbtouch->data)
 794                 goto out_free;
 795
 796         if (type->flags & USBTOUCH_FLG_BUFFER) {
 797                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
 798                 if (!usbtouch->buffer)
 799                         goto out_free_buffers;
 800         }
 801
 802         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
 803         if (!usbtouch->irq) {
 804                 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __FUNCTION__);
 805                 goto out_free_buffers;
 806         }
 807
 808         usbtouch->udev = udev;
 809         usbtouch->input = input_dev;
 810
 811         if (udev->manufacturer)
 812                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
 813
 814         if (udev->product) {
 815                 if (udev->manufacturer)
 816                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
 817                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
 818         }
 819
 820         if (!strlen(usbtouch->name))
 821                 snprintf(usbtouch->name, sizeof(usbtouch->name),
 822                         "USB Touchscreen %04x:%04x",
 823                          le16_to_cpu(udev->descriptor.idVendor),
 824                          le16_to_cpu(udev->descriptor.idProduct));
 825
 826         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
 827         strlcpy(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
 828
 829         input_dev->name = usbtouch->name;
 830         input_dev->phys = usbtouch->phys;
 831         usb_to_input_id(udev, &input_dev->id);
 832         input_dev->dev.parent = &intf->dev;
 833
 834         input_set_drvdata(input_dev, usbtouch);
 835
 836         input_dev->open = usbtouch_open;
 837         input_dev->close = usbtouch_close;
 838
 839         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 840         input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
 841         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
 842         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
 843         if (type->max_press)
 844                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
 845                                      type->max_press, 0, 0);
 846
 847         usb_fill_int_urb(usbtouch->irq, usbtouch->udev,
 848                          usb_rcvintpipe(usbtouch->udev, endpoint->bEndpointAddress),
 849                          usbtouch->data, type->rept_size,
 850                          usbtouch_irq, usbtouch, endpoint->bInterval);
 851
 852         usbtouch->irq->dev = usbtouch->udev;
 853         usbtouch->irq->transfer_dma = usbtouch->data_dma;
 854         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 855
 856         /* device specific init */
 857         if (type->init) {
 858                 err = type->init(usbtouch);
 859                 if (err) {
 860                         dbg("%s - type->init() failed, err: %d", __FUNCTION__, err);
 861                         goto out_free_buffers;
 862                 }
 863         }
 864
 865         err = input_register_device(usbtouch->input);
 866         if (err) {
 867                 dbg("%s - input_register_device failed, err: %d", __FUNCTION__, err);
 868                 goto out_free_buffers;
 869         }
 870
 871         usb_set_intfdata(intf, usbtouch);
 872
 873         return 0;
 874
 875 out_free_buffers:
 876         usbtouch_free_buffers(udev, usbtouch);
 877 out_free:
 878         input_free_device(input_dev);
 879         kfree(usbtouch);
 880         return err;
 881 }
 882
 883 static void usbtouch_disconnect(struct usb_interface *intf)
 884 {
 885         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
 886
 887         dbg("%s - called", __FUNCTION__);
 888
 889         if (!usbtouch)
 890                 return;
 891
 892         dbg("%s - usbtouch is initialized, cleaning up", __FUNCTION__);
 893         usb_set_intfdata(intf, NULL);
 894         usb_kill_urb(usbtouch->irq);
 895         input_unregister_device(usbtouch->input);
 896         usb_free_urb(usbtouch->irq);
 897         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
 898         kfree(usbtouch);
 899 }
 900
 901 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
 902
 903 static struct usb_driver usbtouch_driver = {
 904         .name           = "usbtouchscreen",
 905         .probe          = usbtouch_probe,
 906         .disconnect     = usbtouch_disconnect,
 907         .id_table       = usbtouch_devices,
 908 };
 909
 910 static int __init usbtouch_init(void)
 911 {
 912         return usb_register(&usbtouch_driver);
 913 }
 914
 915 static void __exit usbtouch_cleanup(void)
 916 {
 917         usb_deregister(&usbtouch_driver);
 918 }
 919
 920 module_init(usbtouch_init);
 921 module_exit(usbtouch_cleanup);
 922
 923 MODULE_AUTHOR(DRIVER_AUTHOR);
 924 MODULE_DESCRIPTION(DRIVER_DESC);
 925 MODULE_LICENSE("GPL");
 926
 927 MODULE_ALIAS("touchkitusb");
 928 MODULE_ALIAS("itmtouch");
 929 MODULE_ALIAS("mtouchusb");